904L Stainless Steel Strip

Introduction to 904L Stainless Steel Strip Properties

904L stainless steel strip is a sophisticated high-alloy austenitic grade with low carbon content, specifically engineered for severe corrosive environments. This premium stainless steel strip has proven its reliability over decades, originally developed to combat corrosion in dilute sulfuric acid applications. As a fully austenitic material, it shows reduced sensitivity to precipitation ferrite and sigma phases compared to conventional austenitic grades with high molybdenum content.

The exceptional performance of 904L stainless steel strip comes from its unique composition, featuring high levels of chromium, nickel, molybdenum, and copper. This combination delivers superior resistance to general corrosion, particularly in sulfuric and phosphoric conditions.

Technical Specifications and Applications

Product Specifications:

• Grade: 904L (UNS N08904/EN 1.4539)
• Thickness Range: 0.02mm-3.0mm
• Width Options: 1.5mm-600mm
• Length: Available in coil type or customized lengths
• Surface Finishes:
  • NO.1
  • 2B
  • 2H (Rerolled Bright)
  • BA
  • No.4
  • 8K (Mirror)
  • HL (Hairline)
  • Polishing Bright
• Edge Types: Mill Edge, Slit Edge, Deburred Edge, Round Edge, V Type Edge

Key Features:

• Excellent activation-passivation transformation capability
• Superior corrosion resistance in non-oxidizing acids
• Enhanced pitting corrosion resistance in neutral chloride environments
• Suitable for sulfuric acid environments (concentrations below 70°)

Primary Applications:

1. Petrochemical Equipment & Reactors
2. Heat Exchangers (including seawater applications)
3. Power Plant Flue Gas Desulfurization Systems
4. Organic Acid Treatment Facilities
5. Paper Processing Equipment
6. Pharmaceutical Manufacturing Units
7. Pressure Vessels
8. Food Processing Equipment

The versatility and durability of 904L stainless steel strip make it the preferred choice for industries requiring exceptional corrosion resistance and reliable performance in aggressive chemical environments.